Re: [Boost-users] ranking of ublas vector

Am 14.03.2010 um 15:42 schrieb Steven Watanabe:

AMDG

Kraus Philipp wrote:

...

I think the problem is:

we discuss about the "rank" and the "rank index".

I my problem I only need the rank index and the value to calculate a new value like: exp( -rank_index) * vec(rank_index)

So the smallest element in vec will be multiply with 1 and other elements with values < 1

This doesn't quite add up for me.

Taking the example from before, you have [4](0.405121, 0.943918, 0.887914, 0.338921) and [4](3, 0, 2, 1)

You don't want exp(-3) * vec(3), right? Is exp(-0) * vec(3), exp(-1) * vec(0), ... correct?

Exactly. This rank option is used in neuronal networks for setting the "winner" neuron. I hope this option will be set up into the boost standard :-P Thanks Phil